The barley leaf rust fungus forms appressoria over host leaf stomata and penetrates via the stomatal pore. High levels of avoidance to leaf rust fungi have been described in some wild accessions of Hordeum species where a ...

Tritordeum and agroticum amphiploids, derived from hybridization of Triticum species with Hordeum chilense or Agropyron cristatum, were assessed for resistance to Blumeria graminis. In glasshouse tests, all parental lines ...

Barley, oat and wheat were used as both inappropriate hosts (IH) and appropriate hosts (AH) for three formae speciales of the fungus Blumeria graminis, the causal agent of powdery mildew disease. Treatment with either the ...

The relative strength of adhesion by Blumeria graminis conidia and germlings to barley leaves and to clean (hydrophilic) or silanized (hydrophobic) glass, was assessed using centrifugation. Ungerminated conidia were incubated ...

Stomata regulate gas exchange and their closure in response to pathogens may, in some cases, contribute to resistance. However, in the cereal mildew and rust systems, stomatal closure follows establishment of compatible ...

A much clearer picture is now emerging of the fine structure of the plant cuticle and its surface, the composition of cuticular waxes and the biosynthetic pathways leading to them. Studies assessing the impact of UV radiation ...

Increase your understanding of powdery mildew fungi and the plant diseases they cause with the new book The Powdery Mildews: A Comprehensive Treatise. This valuable new reference work conveys the substantial scientific ...

A collection of 67 accessions of Pisum species originating from different countries was screened in a glasshouse test for resistance to Erysiphe pisi. All Pisum fulvum accessions were completely resistant. Incomplete ...

Time-course studies showed that light delayed haustorium formation by Erysiphe graminis f.sp. avenae on oat leaves, although it did not affect germination or formation of the first appressorial lobe. Under continuous light ...

In pea, two single recessive genes, er1 and er2, have been identified for resistance to powdery mildew caused by Erysiphe pisi, but little is known about their mode of action. Pea accessions carrying the genes er1 or er2 ...

Nonspecific penetration resistance due to papilla formation and race-specific hypersensitive response (HR) can both contribute to Blumeria graminis resistance in barley. Some effective papillae form even in the susceptible ...

Nitric oxide has attracted considerable interest from plant pathologists due its established role in regulating mammalian anti-microbial defences, particularly via programmed cell death (PCD). Although NO plays a major ...